Magazine of Civil Engineering, №4(39), 2013
Foundation engineering. Hydraulic construction
for this half-year
V.N. Bukhartsev, E.N. Volkov
Fractured rock mass model
was analyzed. Formula of modulus of elasticity for fractured rock mass
distance from the fault was deduced. Influence of discontinuities on
distribution was estimated with using experiment design method.
V.S. Utkin, E.A. Shepelina
There are two ways of calculations of reliability
regarding to the real conditions of collecting information on the
parameters. The first method features description of the functions of
variables distribution capabilities, and in the second method the
variables (parameters) are described by distribution functions obtained
the Chebyshev’s inequality.
Using the theory of hereditary creep
generalizing models for calculating the plastic deformation of the
loading were obtained. The proposed method of calculating the residual
deformations of granular materials by cyclic loading is integrating the
functions describing the increment of plastic strain.
The analysis of Mohr–Coulomb plasticity
criterion was performed and it was found, that in case of a limiting
state by this criterion pavement smoothness goes out of the limits
normative documents. On the basis of analysis of
criterion there were obtained formulas
connecting ultimate strength uniaxial compression and tension with the
parameters of Mohr-Coulomb failure envelope.
V.A. Sokolov, D.A. Strakhov, L.N.
The necessity to take into account flexibility of pile foundation in
design of such structures as towers for mobile communication or radio
especially under dynamic loads (seismic, fluctuating component of wind
the resonant vortex excitation) has been considered. The specific
features of modeling of pile ductility, using program
complex SCAD, were discussed and examples of corresponding calculations
D.N. Kasharin, Thai Thi Kim Chi
Issue of shape
calculation of water-filled membranes is considered, depending on
pressures and external forces. Stability of water-filled membranes
hydrostatic pressure and uplift forces is analyzed. Explanations and
requirements for creating new structures of flexible dams are given;
satisfy requirements for ecological infrastructure and provide
terms of construction on biogenic soils and in crowded urban places.
N.P. Lavrov, A.V. Shipilov, G.I.
On the basis of the
physical modeling results the flow characteristics of sluiceway channel
water intake on the river Issyk-Ata, Kyrgyzstan were determined.
models of discharges of elements of sluiceway channel with their mutual
influence were obtained, using the methods of experimental design and
analysis. The influence of the
concentration of brash ice on the sluiceway channel and its elements is
T.S. Ivanov, N.V. Badenko, V.A.
Traditional way to find location for prospective
hydropower plants consists in comparing several variants of location
hydropower development and several marks of normal pond level. Unlike
traditional method, developed methodology and GIS-based tools allow
large number of locations and considerably automating calculations.
The paper considers canals, lined within the wetted
perimeter by concrete and by coarse-grained non-cohesive soils, and
canals without facing. In the process of calculation all hydraulic
of the canal are changing, except for the relative width of the canal
bottom and ratio of slope gradient above
and below the shore line.
Dynamic behavior of heterogeneous viscous-elastic
system ”dam – foundation” is studied
under short-time intensive load subjected
to the foundation. Weak dependence of energy dissipation in a system
viscous-elastic properties of material on the frequency of natural
oscillations, as well as dependence of wave removal of energy on
natural frequencies of system oscillations are revealed.